when reaching the 40- 50 mph range...car felt like was going to die..one dealership replaced a few fuel coils and another dealership just changed out all the plugs($776) and charged for a flush so "the heads or plugs wouldn't break upon removal'...is doing better now but still runs a bit rough around the 50 - 60 mph range...now i need to get more work done as the engine revs hi in low gears..think i got a dud..nothing but problems here...